-18=3n+30-9n

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Solution for -18=3n+30-9n equation: 



-18=3n+30-9n

We move all terms to the left:

-18-(3n+30-9n)=0

We add all the numbers together, and all the variables

-(-6n+30)-18=0

We get rid of parentheses

6n-30-18=0

We add all the numbers together, and all the variables

6n-48=0

We move all terms containing n to the left, all other terms to the right

6n=48

n=48/6

n=8

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